You will need to fly with the pup in the cabin. Due to the current COVID situation, a lot of the limited pet routes are not even flying. Working on getting a dog into the US right now. Domestic lines are not flying animals at all and the International lines have limited airports. I think five; JFK, Chicago, Dallas, Seattle, and one I can't remember.
I do know I have to go to either Chicago or Dallas for my situation.
The other possibility is to ground transport your new pup. Check out a site like
Pet Relocation | Pet Moving Services | Animal Transport | Happy Tails Travel for information on how to do it.